| Term: | element |
| Definition: | A mathematical relation that defines how the degrees of freedom of a node relate to the next. |
| Term: | element |
| Definition: |
A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. The term is also used to refer to a pure chemical substance composed of atoms with the same number of protons. [Wikipedia] |